________students took the high school entrance exam on time ________ the morning of June 16th in Yancheng , though it rained heavily .
—Where is Mr.Chen? —He________the post office already.
You________the beauty of nature whenever you________here.
—Will she come to your birthday party? —________.
These boys had problems________to the top of that mountain.
Three fifths of the students in our school________boys.